Nickel Silver Wire Assortment 0.7-4.0 mm measure approximately 6" in length. Nickel Silver Wire Assortment 0.7-4.0 mm is an assortment of wire rods ranging from 0.70 mm to 4.00 mm. Most commonly used for making rivets but can be used for a variety of clock repairs. Forged out of Nickel, this wire is strong and durable resistant to the effects of time.